A little more info would be nice-yes you are all electric. Does that mean you're at the power pole all the time? Or do you run a generator alot? Do you dry camp (no power pole)? Do you want to run your 120vac on batteries at times without the genset?

Sean has something like 8-8D AGM batteries with a 4,000 watt inverter to be able to run without genset for 24 hours-including being able to run a roof top A/C on the inverter.

Get some golf cart batteries and put 2 in series to create 12V. I only have 2 and they last a LONG time if using LED lighting and water pump only. Golf cart batteries are cheap and you can get them most anywhere. The trojan T-105 you can get for just over $100 each i believe.

Use 5 8D Gel Batteries, with a 2500 watt inverter that includes a 100 amp charger. Total electric (No LP Gas), 10 KW Power Tech, seems to work fine for me using a Samsung 24 Cu ft two door refrig with ice & water in door, yes I have spoiled myself.LP is just too much of a hassel, including being hazordous, tunnels etc.Dave M